Necticut



2 Sheets-Sheet 1.

W. S. WILLIAMS.

REAPING MACHINES.

Patented Aug. I2

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GRINDER IOR FINGER BARS AND SIGKLE BARS POR MOWING AND (No-Model.) 2Sheets-Sheet 2.

n W. s. WILLIAMS. GRINDRR FOR FINGER BARS AND SIGKLE BARS FOR MOWING ANDREAPING MACHINES. No. 434,1251. Patented Aug. 12., 1890.

UNITED STATES PATENT LOE-FICE. y

WILLIAM S. VILLIAMS, OF EAST HARTFORD, CONNECTICUT, ASSIGNOR TO THEVILLIAMS BROTHERS MANUFACTURING COMPANY, OF CON- NECTICUT.

GRINDER FOR FINGER-BARS AND SlCKLE-BARS FOR MOWING AND REAPlNG MACHINES.

SPECIFICATION forming part of Letters Patent No. 434,124, dated August12, 1890. y

Application filed July 31, 1888. Renewed February 24, 1890. Serial No.341,400. (No model.)

` of East Hartford, in the @Oum-,y of Hartford and State of Connecticut,have invented certain Improvements in Grinders for Finger- Bars andSickle-Bars for Mowin g and Reaping Machines, of which the following isa specification.

The cutting mechanism of mowing and reaping machines consists of astationary bar provided with guard fingers having Xed blades known asledger-plates therein, and of a reciprocating sickle-bar havingtriangular knives, which pass through the guardiingers over theledger-plates.

The aim of my invention is to provide a machine by which theledger-plates may be rapidly ground and sharpened at their edges Whilein place on the inger-bar, and to adapt the same machine for thegrinding of the knives of the sickle-bar.

My machine comprises a frame with a rotary grinding stone or Wheel,peculiar adj ustable supports for the parts to be ground, and mechanismfor automatically moving the rests to and from the wheel when themachine is in action.

In the accompanying drawings, AFigure l is a side elevation of mymachine. Fig. 2 is a top plan view of the same. Fig. 3 is a section -onthe line w a: of Figs. l and 2. Fig. 4 is a front elevation of the restor support for the nger-bar. Fig. 5 is a top plan view of the same. Fig.6 is a top plan view of the rest employed in grinding sickle-knives.Fig. 7 is a side elevation of the same. Fig. 8 is an edge View of thesame.

In constructing my machine I forni or secure upon a suitable base A astandard B, having at its upper end bearings to sustain a horizontalshaft C, which is'provid ed at one end with a hand-crank D, and near theother end with a beveled gear-wheel E. This gear I engage with a smallergear F, secured on a second horizontal shaft G, carrying agrinding-wheel H of emery or other suitable material. The grinder-shaftG is sustained in the standard B and in a second standard A',

rising from the base, whereby the grindingwheel is accurately guided inits rotation while receiving a rapid motion through the intermediategear from the crank. Upon the base opposite the edge of thegrinding-wheel I locate a plate I, slotted, and secured by a bolt .Ipassing through the slot, so that it may be moved to and from the wheel.

K represents an upright round post mounted between ears t' on the plateI, and connected thereto by a horizontal supporting-pivot t',

so that its upper end may swing to and from the wheel. The lower end ofthe post has a rigid arm k carried toward the stone and bent at its endat a right angle to forma crank or wrist 7c', which is connected by apitman 7a2 to a crank-pin 7c3 on the end of the shaft C, whereby thepost K is given a constant vibration to and from the stone.

On the upper end of the vibrating post I mount a sleeved plate L, whichmay be revolved or adjusted vertically thereon at will. It is sustainedby a pin 7c* seatedin one of a series of holes in the post andchangeable from one to another at will. This pin, by encountering thewalls 705 of a notch in the lower end of a sleeve, limits the rotarymotion of the sleeve. A set-screw k6 mounted in the sleeve and actingagainst the post holds the sleeve rigidly in any position in which itmay be placed.

M indicates a rest or support for the iingerbar located between the postand the stone and connected by an approximately horizontal pivot on tothe sleeve L, so that it may be given an inclination from the horizontalto the right or lett, according as it is required to grind theledger-plates on one edge or the other. rest or support with threadedneckspassed through a bar m2 and provided with nuts'm3, whereby the restM may be placed at any required inclination to the post and the horizon.The rest is formed with forwardly and upwardly extending arms m4, havingthereon a board or plate m5 to receive the finger-bar and sustain thesame in proper position for presentation to the edge ot the stone. Set-Arms m extend rearward from the A screws m6 passed upwardI through thearms of the restserve as a mea-ns of raising the forward edge of thefinger-bar and determine the angle of its presentation to the stone.

Set-screws m7 passed through the rear side of' 1 zontal, as shown inFig. 3, and connect the the upper face ofthe stone.

pitman to a sleeve G, which is arranged to slide on the wrist andsecured by a set-screw g. By moving this sleeve along the wrist, andsecuring it in different positions, the post may be caused to' stop inits forward movement at any required distance from the grindingwheel. Asa further means of limiting the advance of the post and rest, and as ameans of limiting the length of the vibration, I make the throw of thecrank variable in any suitable manner, preferably by providing the diskon the end of the shaft C, at different distances from the axis, with aseries of holes, as shown'in Fig. 3, into either of which the crank-pinmay be secured at will.

It will be observed that the arms of the rest to sustain the finger-barare rigid, so that the bar is given a positive support, and sustained atthe required angle in its cross-section to the stone. In the grinding ofsickle-knives, this rigid support is not desirable. On the contrary, itis desirable to have the knives rest freely and with their entire weightupon I therefore provide a second rest S, which may be applied to thesleeve L in place of the rest M. This second rest consists, iirst, of aplate s adapted to fit upon the pivot m, land provided with a curvedslot to receive a clamping-screw s', so that it may be inclined to theright or left. To this plate is hinged the rest-plates2, so that it maybe tipped upward and downward at the edge nearest the grinding-stone. Onthis plate s2 is placed a clamp S5, guided and held in place by bolts s4and. sustained when released by lifting-springs S5. An eccentric levers6, mounted on a stud 37, and acting beneath an overlying stationary barS8, serves to force the parts together, and thus confine the cutter-bar,which is inserted between the clamp s3 and plate s2. l

When the above device is placed on the sleeve, the clamp serves to holdthe cutterbar and present it in proper relation to the grinding-Wheel,allowing it, as it is moved to and from the grinding-wheel, to restthereon and to sink as it is ground away.

In using the machine for the grinding' of finger-bars, the bar is laidupon the rest M and sustained thereby in position. The rest is then adjusted to the required inclination to the right or left, the vibration ofthe post suitably regulated, and the driven crank turned to set thewheel in motion. The post being automatically vibrated, advances thepost toward the wheel and automatically withdraws it, so that the edgeof the wheel is caused to advance along and sharpen the edge ofthe firstledger-plate. The bar is then moved endwi'se on the rest, the next platesharpened in like manner, and so on repeatedly until all the plates aresharpened on one edge, after which the rest is tipped in the oppositedirection, the movement of the lever reversed, and the plates ground oneafter another on their opposite edges.

In grinding the finger-bars I prefer to employ a wheel with a bevelededge, as represented in Figs. 1 and 2; but a thin grindingwheel withiiat faces may be employed.

In the grinding of cutter or sickle bars I prefer to use a stone with asquare or rectangular edge.

Having thus described my invention,what I claim is- 1. Thegrinding-Wheel and the driving-shaft C geared thereto, in combinationwith the vibratory post K, its crank-arm, the pitman, and the crank onthe drivin g-shaft, the sleeve adjustable around the post, and the restpivoted to and adjustable as to its lateral inclination upon the sleeve.

2. In a machine for sharpening harvesterknives, the grinding-wheel, theshaft C geared directly thereto and provided with the crank 7c3, incombination with the pivoted vibratory postprovided with the rest tosustain the cutter, the arm extending rigidly from the lower end of thepost and provided with the laterally-inclined wrist, as described, thepitman .attached at one end to the crank, the slide pivote'd to thelower end of the pitman and adjustable lengthwise upon the inclinedwrist, whereby the rest may be advanced toward the stone a greater' orless distance, as circumstances may require.

3. The grinding-Wheel and the driving-shaft geared to said wheel andprovided with crank k3, in combination with the vibratory postK, havingthe angular rigid arm k, the pitman connecting said arm with the crankk3, the rest for the cutter connected with the post through a horizontalpivot, in order that its lateral inclination may be reversed, and thepost-sustaining plate I, adj usted, as described,

-to and from the grinding-wheels.

4. In a grinding device for harvester-cutters, the grinding-wheel, incombination with the vibratory post, the rotary sleeve L thereon, theadjustable stop-pin 7a4 and set-screw 7c to receive said sleeve, therest N, pivotally connected to the sleeve, and a clamping device unitingthe rest and sleeve to maintain the adjustment of the former,substantially as described.

5. In a machine for sharpening harvesterknives, the combination of thegrinding-Wheel,

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through the back of the rest to act on the rear edge of the cutter.

In testimony whereof I hereunto set my hand, this 15th day of February,1888, in the presence of two attesting Witnesses.

VILLIAM S. VILLIAMS.

i Vitnesses:

D. W. WILLIAMS, BERNARD T. WILLIAMS.

